Attachment for electric lamps



June 19, 1923.

. L. SCHMIDT ATTACHMENT FOR ELECTRIC LAMPS Fi1ed,June 18. 1921 ATTORNEYPatented June 19, 1923.

' asaeea LAMBERT SCHMIDT, or BROOKLYN, NEW Yonx.

'1 mumornvnnvr ron ELECTRIC; LAMPS.

Application filed June is, 1921. Serial Nam-8,694.;

To all whom it may concern Be it-known that I, LAMBERT SCHMIDT, acitizen .of the United States,xand resident of the borough of Brooklyn,countyof Kings,- city and .StateQof New York, have ina vented certainnew and useful Improvements in Attachments forElectric Lamps,-

of which the following is a specification.

This invention relates to attachments for electric lamps andmoreparticularly to such attachments v as are used to hold a shade againstthe lamp bulb in sucha manner that on the vibration of the lamp orshade,.the

shade will beheld tightly against the bulb so as to/prevent a jarring orconcussion of one in respect to: the other. It has heretofore beenproposed to providefsuch attachments, but: they have not been entirelysatisfactory because on the one hand they require a special form of alamp shade to fit over aspecially shaped bulb-,arid on the other hand,they require aspecial form of base on .to which the attachment'isapplied. Such special devices discouraged the general use of attachmentsof this kind in view of the expense and inconvenience connected withsuch special devices.

The object of my invention is to provide an improved attachment which isso arranged that it will huggingly hold a lamp shade against a bulb soas to prevent relative vibratory actions of one in respect to the otherand thereby prevent either bulb or shade from becoming'broken, butmainly to provide an improved means whereby any ordinary base or lampmay have applied thereto in a convenient manner the improved attachmentwithout any change whatever in the base or in the lamp bulb .or in thelamp shade. The invention will be more fully described hereinafter andfinally pointed out in the appended claim.

In the drawings,

Figure 1 shows a side view of an ordinary base and a lamp bulb with theshade applied thereto which isin the form of the regular shade as foundupon the market, the shade being held against the bulb by my improvedattachment; 1 t

Figure 2 shows a plan viewof the bottom side of my improved attachment;

Figure 3 is a vertical centralsection of my attachment; 7 V

Figure 4 shows an enlarged view of the socket.

attachment holding the shade against the Similar characters of referenceindicate corresponding parts throughout the various views. Referring tothe drawings and more particularly to Figure 1, the ordinary Edison,base'iconsisting of a screw threaded portion 1 0,anda small shoulder 11,is there shown as partof the lamp bulb 12. The drawings represent well,known form of both the lamp and base.- The lamp bulbfl2 has the usualfi1ament13. The exterior diameter of the shoulder 11, which is partofthe well known base is substantially equal tothe exterior and largestdiameter of the threaded portion. v

In Figure 1, if a line be drawn through the J outer edge of the threads,that line. will passthrough the exterior surface of the=shoulder 11. ,7p I I provide a collar 15, shown clearly in Figure 3, in section, whichmay be said to a be generally of inverted 'U-shape, excepting that ithas its exterior side orv flange at an inclination to the plane of theupper surface of the collar. The direction of the inclination is shownbythe dotted lines 1616 of Figure 3 and thereby the exterior flange 17 isformed. The'interior flange 18 is substantially perpendicular to theaforesaid.

plane and the annulus 19 is in the aforesaid plane.

shown in Figure 2, the object of these'being to allowa yieldablemovement of the parts 21 of the flange 1'8ibetween the cut outs 20.

cesses or cut outs enable a clamping actionto take place so as to give asecure frictional The flange 18 is provided with cutv outs 20,.preferably three in number, as

hold, such as to hold the flanges 24 0f the shade 25 and hence the shadeagainst the bulb. The frictional hold is such that any 7 ordinaryvibration of the shade in respect to the bulb is counter acted and theshade is held firmly at all times against the bulb.

To insure this further, the inclined flange 17 of the collar which isalso provided with cut-outs 4O acts to press tightly against .the 05flange 24 of the shade and in so doing -becomes, due .to its resilientcharactenshaped into a positon substantially parallel with the flange ofthe shade. By the continuous pressure thus exerted, the flange 17 servestohold the flange of the shade firmly against rattling, and at the sametime the reaction resulting on the collar or its innermost..

, at 26 is frictionalthe engagement of the parts at 26 being frictionaland that at 27 being of a clamping character.

It Will thus be seen that my improvement is such that it may be readilyused to combine a shade with a bulb or hold ashade huggingly to a bulbWithout danger of having either part vibrate in respect to the other.The construction is such that it may be readily manufactured at a smallexpense and may be readily applied to existing bases of lamp shades,neither an especially shaped base, nor a special shaped lamp shade beingnecessary, nor a special shaped bulb being necessary, as was heretoforeproposed. The frictional hold obtained is a very secure hold and servesadmirably to hold the respective parts in position and at the same timepermits, first, a ready dissembling of the parts, and secondly, a readyassembling of the same. r

Having thus described one satisfactory and practical embodiment of myinvention,

it is nevertheless understood that the same is susceptible to many othermodifications, and I accordingly reserve the privilege of adopting allsuch legitimate changes as may be fairly "embodied Within the spirit andscope of the invention as claimed.

I claim: i

An attachment for electric lamps comprising a sheet metal annulus ofangular form in cross section, having a horizontally disposed flangeadapted to surround a lamp plug and'provided with a split flangeextending from the inner edge of said horizontal flange and affording aseries of resilient tongues for frictional clamping engagement Wltll'thGplug, said annulus also having a second flange at the outer edge'of saidhorizontal flange "inclined inWardlyin convergent relation to said splitflange and of greater Width than the latter, said inclined flange beingadapted for frictional clamp ing engagement With the terminal flange ofy a lamp shadeto support said shade in ap- BER r sor-mrn'r]

